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@WARD SCHULTZ, O'F MAYWOOD. ILLINOIS. ASSIGNOR TO"M1ERICAN-CAN COEIPANY, OlE NEW YORK. N. Y., A CORPORATION F NEW .'EBSEY.

PROCESS 0F APPLYING CELLULOID TO PAINTED SURFACES.

Application filed July 26, 1921. Serial No. 487,777.

To all whom if may concer/n.'

Be it known that l, EDWARD Scum/rz, al citizen of the United States, residing in Maywood, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Processes of Applying Celluloid to Painted Surfaces, of which the following is a specification.

My invention relates to a process of uniting Celluloid to painted surfaces, a

nd while in the particular embodiment used for the purpose of illustration, ployed for the purpose of covering luloid metal plates or'boards of the process is emwith celthe type used as Iingerboards on adding or listing machines, it will be understood that the invention has a much wider scope and is of general application in providing articles of various An important object of the inv kinds with a Celluloid covering cntion is the provision of a method or process adapted to produce firm adhesion of the Celluloid sheet to the surface to which it is applied throu hout its surface of application.

A urther object of the invention is the 'a process of uniting provision of the substances mentioned, which results in rendering the painted or printed characte covered surface clearly coating,

rs on the visible upon vthe it being understood that for the'accomplishnient of this purpose a transparent Celluloid is used.

A still further obj the provision of a process ect of the invention is of the character a glazed-finish surface, accentuating the lustre of the paint and simulating a glass covering.

Another and highly important object of the invention is the provision of a process for the purpose stated, which provides an eectual protective .coating for thepainted characters, preventing wear or effacement of them through exposure or through Contact in use.

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which, taken in connection with the accompanying drawings, discloses a preferred embodiment thereof.

Referring to the drawings, Figure 1 is a front adding machine keyboard produce method of my invention;

elevation of a Small d by the Fig. 2 is a side view of a metal board 55 quer has been applied; im

of the Fig. 4 is a side elevational view metal and the lacquered Celluloid covering in the process of being united under the pressure of rollers; and

Fig. 5 is an enlarged section of'a portion of the united board and Celluloid covering. l

It will be noted that the embodiment of the invention shown in the drawings cornprises primarily a metal board 1l. having painted or printed thereon characters 12, these, in the present instance, being an outline arrangement of the numerals used upon a keyboard for adding or listing machines and the like, and a Celluloid covering 13, which is applied to the metal board in a manner to be hereinafter described.

ln carrying out the process of my invention, the metal board 11, or preferably a large sheet from which a number of boards are subsequently stamped,l is printed, painted or varnished as may be desired. A transparent Celluloid sheet, numbered 13 in the drawings, is then coated with lacquer of suitable composition and thickness to act as a solvent for the varnish or paint. The mixture which I have found most ecacious for this purpose consists of. a half partof what is commonly known as Celluloid lacquer, and a half part of thinner, though it will be understood that my invention is not limited to the particular type of solvent solution employed. The lacquered transparent Celluloid is then applied to the metal board or sheet, carebeing taken to prevent slipping or any relative movement of the board and the celluloid, since this would result in a spreading and inarring of the Characters on the board. Upon application of the lacquer, which is lindicated y the reference Character 14, and which at this stage is coated upon the celluloid, the paint or varnish l5 is partially dissolved and unites with the lacquer. To complete the uniting action of the two substances, however, and to cause the paint or the varnish to adhere tothe Celluloid strip, the metal board or sheet with the Celluloid adhering thereto is passed through rollers 1.6 or otherwise subjected to pressure. This results in adhesion of the entire composition to the metal base and also pressesout any surplus of the solvent mixture. It is desirable that the edges of the board be enclosed in absorbent material such as soft paper in order to take up this surplus mixture.

It Will be observed that the means for applying pressure to the board and covering comprises, as illustrated, the two rollers 16 such as are used in a clothes Wringer, but it is manifest that other means of accomplishing this result, either automatic or manually controlled, may be employed Within the contemplation of the invention. After the foregoing operations have been completed the individual articles, such as fingerboards, are stamped out or blanked and 4may subsequently be punched and formed to any desired shape.

Great difficulty has been experienced in obtaining proper and effective cohesion ofl cell-uloid to metal, and as a result the usual method of attaching a celluloid covering has been to clinch or otherwise secure the edges thereof about the outerl edges of the article to which it was applied. Through the use of my invention not only is a firm union produced between the celluloid and the metal, but the surface characters on the latter are etectually protected and the finished. arti cle provided With a lust-re and brightness of exceptionally pleasingappearance.

It is thought that the invention and many of its attendantv advantages willbe understood .from the foregoing description, and

it will be apparent that various changes may be made in the form, construction `and ar rangementof the parts without departing rom the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described beinglmerely a referred embodiment thereof.

I c aim.: 1. A process of applying celluloid to painted Surfaces, which consists in applying a paint-solvent to celluloid sheets, pressing the solvent coated side of said sheets upon the painted surface .and subjecting the as sembled parts to pressure.

2. A process of applying celluloid to painted surfaces, which consists in applying a paintsolvent celluloid lacquer to celluloid sheets and pressing the lacqueredside of said sheets onto the painted surface.

3. A process of applying celluloid to painted surfaces, which consists in combining celluloid lacquer and a thinning solution in such proportions as to lproduce a paint-'solvent mixture, applying said mixture to one side of the celluloid sheets, arranging t'le coated side of said sheets upon the painted surface and applying pressure thereto.

4. A process of applying celluloid to painted surfaces, Which consists in applying a paint-solvent solution to celluloid sheets positioning said sheets with their coated sides upon the painted surface and applying a rolling pressure thereto.

5. The process of covering articles With celluloid, Which consists in painting the article to be covered, applying a paint-solvent solution to a celluloid sheet throughout its surface, and` uniting the paint on said article and the solvent solution on said sheet under pressure. a

6. The process of covering articles with celluloid, which consists in painting the article to be covered, applying a paint-solvent solution to a celluloid sheet and uniting the paint on said article and the solvent solution on said sheet under pressure.

7 The process which consists in applying paints to a suitable article or base, applying a celluloid lacquer on a celluloid covering, and subjecting saidbase and covering together to pressure, thereby partially dissolving the paints by said lacquer Without displacing them` and causing the permanent union of said'base and covering.

EDWARD SCHULTZ. 

